* The GoPro roll bar mount lets you attach your HD HERO or HD HERO2 camera to roll bars, tubes and more. Use the GoPro roll cage mount to clamp your camera to the radiator cap on karts; it works with both metal and plastic caps. You can also clamp the roll bar camera mount to bike frames, bumper bars, ski/surfboard racks or any other cylindrical shape that is within 1.4 to 2.5 inches in diameter. The GoPro roll cage mount has pivoting orientation arms allowing for three-way adjustability to ensure you can get the angle you want.